As the threat of abolition intensified with the presidential election of Abraham Lincoln, Georgia joined other slave-holding states in seceding from the Union to form a new nation, the Confederate States of America. Over the next four years, Georgia witnessed success on the battlefield and devastation in its capital as Sherman marched from the Atlanta campaign to the sea. At the conclusion of the Civil War in 1865, America had suffered its deadliest war, and the charred remains of Georgia were readmitted to the United States.